package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.dto.SetmealDTO;
import com.sky.dto.SetmealPageQueryDTO;
import com.sky.entity.Setmeal;
import com.sky.entity.SetmealDish;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.mapper.SetmealDishMapper;
import com.sky.mapper.SetmealMapper;
import com.sky.result.PageResult;
import com.sky.service.SetmealService;
import com.sky.vo.DishItemVO;
import com.sky.vo.SetmealVO;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.ArrayList;
import java.util.List;

@Service
public class SetmealServiceImpl implements SetmealService {
    @Autowired
    SetmealMapper setmealMapper;
    @Autowired
    SetmealDishMapper setmealDishMapper;

    @Override
    @Transactional
    public void save(SetmealDTO setmealDTO) {
        Setmeal setmeal = new Setmeal();
        BeanUtils.copyProperties(setmealDTO, setmeal);

        setmealMapper.insert(setmeal);
        Long setmealId = setmeal.getId();

        List<SetmealDish> setmealDishList = setmealDTO.getSetmealDishes();
        setmealDishList.forEach(setmealDish -> {
            setmealDish.setSetmealId(setmealId);
        });

        setmealDishMapper.insertBatch(setmealDishList);

    }

    @Override
    public PageResult page(SetmealPageQueryDTO setmealPageQueryDTO) {
        PageHelper.startPage(setmealPageQueryDTO.getPage(), setmealPageQueryDTO.getPageSize());

        Page<SetmealVO> setmealVOS = setmealMapper.page(setmealPageQueryDTO);

        return new PageResult(setmealVOS.getTotal(), setmealVOS.getResult());
    }

    @Override
    @Transactional
    public void updateStatus(Integer status, Long id) {
        Setmeal setmeal = setmealMapper.getById(id);
        setmeal.setStatus(status);

        setmealMapper.update(setmeal);
    }

    @Override
    @Transactional
    public void update(SetmealDTO setmealDTO) {
        Setmeal setmeal = new Setmeal();
        BeanUtils.copyProperties(setmealDTO, setmeal);

        setmealMapper.update(setmeal);
        Long setmealId = setmeal.getId();

        setmealDishMapper.deleteBySetmealId(setmealId);

        List<SetmealDish> setmealDishList = setmealDTO.getSetmealDishes();
        setmealDishList.forEach(setmealDish -> {
            setmealDish.setSetmealId(setmealId);
        });

        setmealDishMapper.insertBatch(setmealDishList);
    }

    @Override
    public SetmealDTO getById(Long id) {
        Setmeal setmeal = setmealMapper.getById(id);
        SetmealDTO setmealDTO = new SetmealDTO();
        BeanUtils.copyProperties(setmeal, setmealDTO);
        List<SetmealDish> setmealDishList = setmealDishMapper.getSetmealDishBySetmealId(setmeal.getId());
        setmealDTO.setSetmealDishes(setmealDishList);
        return setmealDTO;
    }

    @Transactional
    public void deleteBatch(List<Long> ids) {
        ids.forEach(id -> {
            Setmeal setmeal = setmealMapper.getById(id);

            if(StatusConstant.ENABLE == setmeal.getStatus()){
                //起售中的套餐不能删除
                throw new DeletionNotAllowedException(MessageConstant.SETMEAL_ON_SALE);
            }
        });

        ids.forEach(setmealId -> {
            //删除套餐表中的数据
            setmealMapper.deleteById(setmealId);
            //删除套餐菜品关系表中的数据
            setmealDishMapper.deleteBySetmealId(setmealId);
        });
    }

    /**
     * 条件查询
     * @param setmeal
     * @return
     */
    public List<Setmeal> list(Setmeal setmeal) {
        List<Setmeal> list = setmealMapper.list(setmeal);
        return list;
    }

    /**
     * 根据id查询菜品选项
     * @param id
     * @return
     */
    public List<DishItemVO> getDishItemById(Long id) {
        return setmealMapper.getDishItemBySetmealId(id);
    }


}
